<template>
  <view>
    <my-search :bgColor="'#C10101'" :radius="20" @myclick="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <scroll-view class="left-scroll-view" scroll-y :style="{height: wh+'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item', i === active ? 'active':'']" @click="activeChange(i)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      <scroll-view  class="right-scroll-view"  scroll-y :style="{height: wh+'px'}" :scroll-top="scrollTop">
          <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
            <view class="cate-lv2-title">/{{item2.cat_name}}/</view>
            <view class="cate-lv3-list">
              <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
                <image :src="item3.cat_icon"></image>
                <text>{{item3.cat_name}}</text>
              </view>
            </view>
          </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins: [badgeMix],
    data() {
      return {
        //当前设备可用的 高度
        wh:0,
        cateList:[],
        active: 0,
        cateLevel2: [],//二级分类的列表。
        scrollTop: 0,
      };
    },
    onLoad(){
      console.log('++++++++++++++++++++++++++++++++++')
      const sysinfo = uni.getSystemInfoSync()
      console.log('------------------',sysinfo)
      this.wh = sysinfo.windowHeight - 50;
      this.getCateList()
    },
    methods:{
      async getCateList(){
        const { data: res } = await uni.$http.get('/api/public/v1/categories');
        console.log(res)
        if(res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message;
        // uni.$showMsg('数据请求成功！')
        this.cateLevel2 = res.message[0].children;
      },
      activeChange(i){
        this.active = i;
        this.cateLevel2 = this.cateList[i].children;
        this.scrollTop = this.scrollTop ===0 ? 1: 0;
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid='+item.cat_id
        })
      },
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
    .left-scroll-view-item{
      background-color: #F4F4F4;
      line-height: 60px;
      text-align: center;
      font-size: 12px;
      position: relative;
      &.active{
        background-color: #FFFFFF;
        &::before{
          content: '';
          display: block;
          width: 3px;
          height: 30px;
          background-color: #C00000;
          position: absolute;
          top: 50%;
          left: 0;
          transform: translateY(-50%);
        }
      }
    }
  }
}
.cate-lv2-title{
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list{
  display: flex;
  flex-wrap: wrap;
  .cate-lv3-item{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 33.33%;
    margin-bottom: 10px;
    
    image{
      width: 60px;
      height: 60px;
    }
    text{
      font-size: 12px;
    }
  }
}
</style>
